Exploring the Color #66637B

#66637B sits at 248° on the color wheel, placing it in the blue family of the cool half of the spectrum. With 11% saturation and 44% lightness, it reads as a heavily muted, shadowed tone — a quiet, restrained presence that recedes rather than competes. Its RGB mix of 102, 99, 123 produces a 5.78:1 contrast ratio against white, which clears WCAG AA for body text in that pairing.

In RGB space #66637B is a close cousin of CSS dim gray — about 19 units away from #696969. Designers reach for blue hues at this saturation when the brief calls for restraint and atmosphere, and at this lightness when they want a present, comfortable mid-canvas voice. On screen the cool cast tends to pair best with warm neutrals in the 25°-45° range to add life.

Darkening Shades

Lightening Shades